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Zircon is a naturally occurring, highly durable zirconium silicate mineral ( ZrSiO4cap Z r cap S i cap O sub 4
) utilized in radiometric dating to determine the age of the Earth's crust, with some specimens dating back over 4.4 billion years. Beyond its geological significance, this mineral features high birefringence and a diamond-like luster, serving as a popular gemstone, a December birthstone, and an industrial material for ceramics and nuclear cladding. For more details, visit GIA . AI responses may include mistakes. Learn more What Is Zircon Gemstone - GIA